Abraham (Bram) Pais (May 19, 1918 – July 28, 2000) was a Dutch-born American physicist and science historian. Pais earned his Ph.D. from University of Utrecht just prior to a Nazi ban on Jewish participation in Dutch universities during World War II. When the Nazis began the forced relocation of Dutch Jews, he went into hiding, but was later arrested and saved only by the end of the war. He then served as an assistant to Niels Bohr in Denmark and was later a colleague of Albert Einstein at the Institute for Advanced Study in Princeton, New Jersey. Pais wrote books documenting the lives of these two great physicists and the contributions they and others made to modern physics. He was a physics professor at Rockefeller University until his retirement.

Abraham „Bram“ Pais (* 19. Mai 1918 in Amsterdam; † 28. Juli 2000 in Kopenhagen) war ein niederländischer Physiker und Quantenfeldtheoretiker. Als Kenner der Physik des 20. Jahrhunderts und ihrer Entwicklung genießt er internationalen Ruf; als Kollege, früherer Mitarbeiter und Freund Albert Einsteins gehört er zu den führenden Einstein-Biographen.

Abraham Pais, född 19 maj 1918 i Amsterdam, Nederländerna, död 28 juli 2000 i Köpenhamn, Danmark, var en holländsk-amerikansk kärnfysiker och vetenskapshistoriker.

Abraham (Bram) Pais (Amsterdam, 19 mei 1918 - Kopenhagen, 28 juli 2000) was een Joods-Nederlands-Amerikaanse natuurkundige en wetenschapshistoricus.

Abraham ("Bram") Pais (Amsterdã, 19 de maio de 1918 — Copenhague, 4 de agosto de 2000) foi um físico neerlandês e um teórico da física quântica. Como profundo conhecedor da Física do século XX e do seu desenvolvimento, ele ganhou reconhecimento internacional; como colega, mais tarde parceiro e amigo de Albert Einstein pertence a ele a mais representativa biografia de Einstein de nosso tempo.